SCTP Tail Loss Recovery Enhancements

Document Type Expired Internet-Draft (individual)
Authors Karen Nielsen  , Rafaelle De Santis  , Anna Brunstrom  , Michael Tüxen  , Randall Stewart 
Last updated 2016-04-21 (latest revision 2015-10-19)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Loss Recovery by means of T3-Retransmission has significant detrimental impact on the delays experienced through an SCTP association. The throughput achievable over an SCTP association also is negatively impacted by the occurrence of T3-Retransmissions. The present SCTP Fast Recovery algorithms as specified by [RFC4960] are not able to adequately or timely recover losses in certain situations, thus resorting to loss recovery by lengthy T3-Retransimissions or by non-timely activation of Fast Recovery. In this document we specify a number of enhancements to the SCTP Loss Recovery algorithms which amends some of these deficiencies with a particular focus on Loss Recovery for drops in Traffic Tails. The enhancements supplement the existing algorithms of [RFC4960] with proactive probing and timer driven activation of the Fast Retransmission algorithm as well as a number of enhancements of the Fast Retransmission algorithm in itself are specified.


Karen Nielsen (
Rafaelle De Santis (
Anna Brunstrom (
Michael Tüxen (
Randall Stewart (

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